First Law of Thermodynamics, Basic Introduction - Internal Energy, Heat and Work - Chemistry
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- Опубликовано: 3 окт 2024
- This chemistry video tutorial provides a basic introduction into the first law of thermodynamics. It shows the relationship between internal energy, heat, and work. It discusses the difference between the system and surroundings and distinguishes an open system from a closed system and an isolated system. In chemistry, work is positive whenever work is done on the system and work is negative whenever work is done by the system. During an exothermic process, heat flows out of the system and it flows into the system during an endothermic process.
Thermochemistry Formula Sheet:
bit.ly/3TP4U4u
First Law of Thermodynamics:
• First Law of Thermodyn...
Thermochemistry Equations:
• Thermochemistry Equati...
Internal Energy, Heat, and Work:
• Internal Energy, Heat,...
Thermochemical Equations:
• Thermochemical Equations
Specific Vs Molar Heat Capacity:
• What Is The Difference...
________________________________
Basic Calorimetry Problems:
• How To Solve Basic Cal...
Final Temperature Calorimetry Problems:
• Final Temperature Calo...
Latent Heat of Fusion & Vaporization:
• Latent Heat of Fusion ...
Coffee Cup Calorimeter:
• Coffee Cup Calorimeter...
More Calorimeter Problems:
• Bomb Calorimeter vs Co...
__________________________________
Specific Heat Capacity Problems:
• Specific Heat Capacity...
Hess Law Problems:
• Hess's Law Problems & ...
More Hess Law Problems:
• Hess Law Chemistry Pro...
Enthalpy of Formation & Heat Combustion:
• Enthalpy of Formation ...
Enthalpy Practice Problems:
• Enthalpy Change of Rea...
__________________________________
Speed of Light, Frequency, & Wavelength:
• Speed of Light, Freque...
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
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Thermochemistry Formula Sheet: bit.ly/3TP4U4u
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Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections
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Professor Organic Chemistry Tutor, this is a fantastic Introduction to the First Law of Thermodynamics. in AP/General Chemistry . I encountered the Laws of Thermodynamics in the beginning of Engineering Physics II many years ago and I really like this material. Thermodynamics is an important subject for students majoring in Mechanical Engineering. This is an error free video/lecture on RUclips TV with the Organic Chemistry Tutor.
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Viewpoints for different fields
This concept of workdone has been a controoversy for me.
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whenever you gain 500, someone else has to loose 500.
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Why was that sad for me lol
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i have a question to raise pls notice ---- is the heat sign (positive or negative) also varies depending on what perspective we are looking at.. ??
i mean let's say the heat comes from the environment to the system-----
perspective of the system:
the system gain heat energy from the environment, thus the heat is positive
perspective of the environment:
the environment transfers heat energy (energy loss from the environment), thus the heat is negative
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Hello Sir,
Work output is higher than work input
When I computed the work done in pool (billiard) the white mother ball break the 15ball. The work brought OUT is more than the work brought IN. Let’s try to compute.
F = 30lbs (White Mother Ball); D = 3ft (From the white mother ball to the first ball to strike)
SOLVE FOR WORK INPUT
W = F X D; W = 30lbs x 3ft = 90Ft.lbs
SOLVE FOR WORK OUTPUT
First two ball extreme corner of the billiard ball 2 out of 15 ball
W = F X D; W = 30lbs x 3ft = 90ft.lbs X 2ball = 180 ft. lbs
The remaining ball (13pcs ball) can produce more than 90 ft.lbs
The computation shows that the output work done is higher than the input work done
so the theory of conservation of energy is misconception.
If you don't agree please show me your computation.
Appreciated for your reply
Thank you.
Abel Urbina
I think that internal equation is the for both. U = Q + W (chemistry) if W = ---, final equation is U = Q --W. And if W = +, equation is U = Q + W.
İn physics it is same. Final equation done by the system is U=Q-W, on the system U=Q+W. Notice it
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A college professor seeking to liven up his course had the following extra credit question an an exam.
"Is Hell exothermic or endothermic? Provide sound evidence to support your answer."
One of his students submitted the following answer. He started by providing all the reasons that would support both an exothermic Hell and an endothermic Hell. After several paragraphs of this he got to the main evidence and its implication. Here is his analysis.
When I asked the pretty coed in the dorm room across the hall if she would sleep with me, she said she would sleep with me "the day Hell freezes over." She has not slept with me which means Hell has not frozen over and therefore must be endothermic. He received full credit.
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